Hello again,
I am trying to setup a Grid with checkboxes where the user can select
several items and submit.
I wrote a CheckboxGroup/Checkbox set of components derived from the
RadioGruop/Radio which enables me to render any number of checkboxes
*all with the same name attribute*. The CheckboxGroup control has a
value parameter (collection) and will put there all the selected items.
Say the page has the following
public ItemChooser {
private List<Item> avilableItems; // assume proper init, getters
and setters
private Set<Item> collectedItems; // here too
}
in ItemChooser.html:
<t:form>
<t:checkboxgroup value="selectedItems">
<t:grid source="availableItems" row="currentItem">
<t:parameter name="idCell" <!-- I render the checkbox instead
of the item.id -->
<t:checkbox value="currentItem" />
</t:parameter>
</t:grid>
</t:checkboxgroup>
</t:form>
The problem is - it doesn't work. I get a NullPointerException inside
the Loop while it's reading its source parameter.
After digging a while I discovered that The Loop component stores
some events in the form and one of them (SETUP_FOR_VOLATILE) is
trying to access the columnNames property of the GridColumns (which
is bound to the source of the Loop), which in turn accesses the
dataModel of the dataProvider (the Grid).
However, the Grid doesn't store any initialization events in the form
at all so the NPE is obvious - the data model isn't
Is this a bug or am I doing something wrong?
Ognen
P.S. Log of the error:
[ERROR] RequestExceptionHandler Processing of request failed with
uncaught exception: Failure reading parameter source of component
Page2Role:permissiondisplay.grid.columns.loop: Failure reading
parameter model of component Page2Role:permissiondisplay.grid:
java.lang.NullPointerException
org.apache.tapestry.ioc.internal.util.TapestryException: Failure
reading parameter source of component
Page2Role:permissiondisplay.grid.columns.loop: Failure reading
parameter model of component Page2Role:permissiondisplay.grid:
java.lang.NullPointerException
at org.apache.tapestry.corelib.components.Form.onAction(Form.java:
375)
at
org.apache.tapestry.corelib.components.Form.handleComponentEvent
(Form.java)
at
org.apache.tapestry.internal.structure.ComponentPageElementImpl.handleEv
ent(ComponentPageElementImpl.java:893)
at
org.apache.tapestry.internal.structure.ComponentPageElementImpl.triggerE
vent(ComponentPageElementImpl.java:998)
at
org.apache.tapestry.internal.services.ComponentActionRequestHandlerImpl.
handle(ComponentActionRequestHandlerImpl.java:81)
at org.apache.tapestry.internal.services.InternalModule$11.handle
(InternalModule.java:541)
at $ComponentActionRequestHandler_1149850824d.handle
($ComponentActionRequestHandler_1149850824d.java)
at $ComponentActionRequestHandler_114985081ce.handle
($ComponentActionRequestHandler_114985081ce.java)
at
org.apache.tapestry.internal.services.ComponentActionDispatcher.dispatch
(ComponentActionDispatcher.java:116)
at $Dispatcher_114985081d0.dispatch($Dispatcher_114985081d0.java)
at $Dispatcher_114985081c3.dispatch($Dispatcher_114985081c3.java)
at org.apache.tapestry.services.TapestryModule$12.service
(TapestryModule.java:1066)
at com.telekurs.pass.online.permissiongui.services.AppModule
$1.service(AppModule.java:75)
at $RequestFilter_114985081c2.service
($RequestFilter_114985081c2.java)
at $RequestHandler_114985081c4.service
($RequestHandler_114985081c4.java)
at
org.apache.tapestry.internal.services.LocalizationFilter.service
(LocalizationFilter.java:43)
at $RequestHandler_114985081c4.service
($RequestHandler_114985081c4.java)
at org.apache.tapestry.services.TapestryModule$2.service
(TapestryModule.java:657)
at $RequestHandler_114985081c4.service
($RequestHandler_114985081c4.java)
at org.apache.tapestry.internal.services.StaticFilesFilter.service
(StaticFilesFilter.java:63)
at $RequestHandler_114985081c4.service
($RequestHandler_114985081c4.java)
at org.apache.tapestry.internal.services.CheckForUpdatesFilter
$2.invoke(CheckForUpdatesFilter.java:97)
at org.apache.tapestry.internal.services.CheckForUpdatesFilter
$2.invoke(CheckForUpdatesFilter.java:88)
at
org.apache.tapestry.ioc.internal.util.ConcurrentBarrier.withRead
(ConcurrentBarrier.java:77)
at
org.apache.tapestry.internal.services.CheckForUpdatesFilter.service
(CheckForUpdatesFilter.java:110)
at $RequestHandler_114985081c4.service
($RequestHandler_114985081c4.java)
at $RequestHandler_114985081bc.service
($RequestHandler_114985081bc.java)
at org.apache.tapestry.services.TapestryModule$11.service
(TapestryModule.java:1044)
at $HttpServletRequestHandler_114985081bb.service
($HttpServletRequestHandler_114985081bb.java)
at org.apache.tapestry.TapestryFilter.doFilter
(TapestryFilter.java:135)
at org.mortbay.jetty.servlet.WebApplicationHandler$Chain.doFilter
(WebApplicationHandler.java:334)
at org.mortbay.jetty.servlet.WebApplicationHandler.dispatch
(WebApplicationHandler.java:286)
at org.mortbay.jetty.servlet.ServletHandler.handle
(ServletHandler.java:567)
at org.mortbay.http.HttpContext.handle(HttpContext.java:1807)
at org.mortbay.jetty.servlet.WebApplicationContext.handle
(WebApplicationContext.java:526)
at org.mortbay.http.HttpContext.handle(HttpContext.java:1757)
at org.mortbay.http.HttpServer.service(HttpServer.java:879)
at org.mortbay.http.HttpConnection.service(HttpConnection.java:789)
at org.mortbay.http.HttpConnection.handleNext(HttpConnection.java:
960)
at org.mortbay.http.HttpConnection.handle(HttpConnection.java:806)
at org.mortbay.http.SocketListener.handleConnection
(SocketListener.java:218)
at org.mortbay.util.ThreadedServer.handle(ThreadedServer.java:331)
at org.mortbay.util.ThreadPool$PoolThread.run(ThreadPool.java:520)
Caused by: org.apache.tapestry.ioc.internal.util.TapestryException:
Failure reading parameter source of component
Page2Role:permissiondisplay.grid.columns.loop: Failure reading
parameter model of component Page2Role:permissiondisplay.grid:
java.lang.NullPointerException [at classpath:org/apache/tapestry/
corelib/components/GridColumns.html, line 3, column 116]
at
org.apache.tapestry.internal.structure.InternalComponentResourcesImpl.re
adParameter(InternalComponentResourcesImpl.java:210)
at org.apache.tapestry.corelib.components.Loop._
$read_parameter_source(Loop.java)
at org.apache.tapestry.corelib.components.Loop.setupForVolatile
(Loop.java:265)
at org.apache.tapestry.corelib.components.Loop.access$100
(Loop.java:46)
at org.apache.tapestry.corelib.components.Loop$2.execute
(Loop.java:69)
at org.apache.tapestry.corelib.components.Loop$2.execute
(Loop.java:70)
at org.apache.tapestry.corelib.components.Form.onAction(Form.java:
364)
... 42 more
Caused by: org.apache.tapestry.ioc.internal.util.TapestryException:
Failure reading parameter model of component
Page2Role:permissiondisplay.grid: java.lang.NullPointerException [at
classpath:org/apache/tapestry/corelib/components/GridColumns.html,
line 3, column 116]
at org.apache.tapestry.internal.bindings.PropBinding.get
(PropBinding.java:58)
at
org.apache.tapestry.internal.structure.InternalComponentResourcesImpl.re
adParameter(InternalComponentResourcesImpl.java:204)
... 48 more
Caused by: org.apache.tapestry.ioc.internal.util.TapestryException:
Failure reading parameter model of component
Page2Role:permissiondisplay.grid: java.lang.NullPointerException
at
org.apache.tapestry.internal.structure.InternalComponentResourcesImpl.re
adParameter(InternalComponentResourcesImpl.java:210)
at org.apache.tapestry.corelib.components.Grid._
$read_parameter_model(Grid.java)
at org.apache.tapestry.corelib.components.Grid.getDataModel
(Grid.java:228)
at
org.apache.tapestry.corelib.components.GridColumns.getColumnNames
(GridColumns.java:122)
at $PropertyConduit_1149850820d.get
($PropertyConduit_1149850820d.java)
at org.apache.tapestry.internal.bindings.PropBinding.get
(PropBinding.java:54)
... 49 more
Caused by: java.lang.NullPointerException
at org.apache.tapestry.corelib.components.Grid$1.get(Grid.java:158)
at
org.apache.tapestry.internal.structure.InternalComponentResourcesImpl.re
adParameter(InternalComponentResourcesImpl.java:204)
... 54 more
--
Ognen Ivanovski | [EMAIL PROTECTED]
phone +389 -2- 30 64 532 | fax +389 -2- 30 79 495
Netcetera | 1000 Skopje | Macedonia | http://netcetera.com.mk
---------------------------------------------------------------------
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
